用mybatis框架时,里面的environment标签总报错
答案:2 悬赏:60 手机版
解决时间 2021-03-03 19:59
- 提问者网友:听门外雪花风
- 2021-03-02 21:15
用mybatis框架时,里面的environment标签总报错
最佳答案
- 五星知识达人网友:痴妹与他
- 2021-03-02 21:46
Public static void main(String[] args) {
Connection connection = null;
PreparedStatement preparedStatement = null;
ResultSet resultSet = null;
try {
//加载数据库驱动
Class.forName("com.mysql.jdbc.Driver");
//通过驱动管理类获取数据库链接
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8", "root", "mysql");
//定义sql语句 ?表示占位符
String sql = "select * from user where username = ?";
//获取预处理statement
preparedStatement = connection.prepareStatement(sql);
//设置参数,第一个参数为sql语句中参数的序号(从1开始),第二个参数为设置的参数值
preparedStatement.setString(1, "王五");
//向数据库发出sql执行查询,查询出结果集
resultSet = preparedStatement.exec...close();).printStackTrace(), ";)+":/
/.close();/
PreparedStatement preparedStatement = null;mybatis;jdbc; TODO Auto-generated catch block
e.println(resultSet.out;).getConnection(".close(), ":3306/!=null){
try {
preparedStatement;);/
}finally{
/
}
}
if(preparedStatement;
ResultSet resultSet = null.setString(1;///加载数据库驱动
Class; TODO Auto-generated catch block
e?" TODO Auto-generated catch block
e;王五"
} catch (SQLException e) {
///定义sql语句 ;释放资源
if(resultSet;/.getString("username"
try {
//.next()){
System;select * from user where username = ;localhost;/?表示占位符
String sql = ".printStackTrace().jdbc;设置参数;/root"
/
/));通过驱动管理类获取数据库链接
connection = DriverManager.getString(".forName(".prepareStatement(sql).Driver"
}
} catch (Exception e) {
e;com;
} catch (SQLException e) {
/id"
} catch (SQLException e) {
/,第二个参数为设置的参数值
preparedStatement;
/!=null){
try {
resultSet.mysql,查询出结果集
resultSet = preparedStatement!=null){
try {
connection,第一个参数为sql语句中参数的序号(从1开始)Public static void main(String[] args) {
Connection connection = null?characterEncoding=utf-8".printStackTrace().executeQuery();遍历查询结果集
while(resultSet; ", ";
}
}
if(connection;mysql".printStackTrace():mysql;
/+resultSet;向数据库发出sql执行查询;
//获取预处理statement
preparedStatement = connection
Connection connection = null;
PreparedStatement preparedStatement = null;
ResultSet resultSet = null;
try {
//加载数据库驱动
Class.forName("com.mysql.jdbc.Driver");
//通过驱动管理类获取数据库链接
connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8", "root", "mysql");
//定义sql语句 ?表示占位符
String sql = "select * from user where username = ?";
//获取预处理statement
preparedStatement = connection.prepareStatement(sql);
//设置参数,第一个参数为sql语句中参数的序号(从1开始),第二个参数为设置的参数值
preparedStatement.setString(1, "王五");
//向数据库发出sql执行查询,查询出结果集
resultSet = preparedStatement.exec...close();).printStackTrace(), ";)+":/
/.close();/
PreparedStatement preparedStatement = null;mybatis;jdbc; TODO Auto-generated catch block
e.println(resultSet.out;).getConnection(".close(), ":3306/!=null){
try {
preparedStatement;);/
}finally{
/
}
}
if(preparedStatement;
ResultSet resultSet = null.setString(1;///加载数据库驱动
Class; TODO Auto-generated catch block
e?" TODO Auto-generated catch block
e;王五"
} catch (SQLException e) {
///定义sql语句 ;释放资源
if(resultSet;/.getString("username"
try {
//.next()){
System;select * from user where username = ;localhost;/?表示占位符
String sql = ".printStackTrace().jdbc;设置参数;/root"
/
/));通过驱动管理类获取数据库链接
connection = DriverManager.getString(".forName(".prepareStatement(sql).Driver"
}
} catch (Exception e) {
e;com;
} catch (SQLException e) {
/id"
} catch (SQLException e) {
/,第二个参数为设置的参数值
preparedStatement;
/!=null){
try {
resultSet.mysql,查询出结果集
resultSet = preparedStatement!=null){
try {
connection,第一个参数为sql语句中参数的序号(从1开始)Public static void main(String[] args) {
Connection connection = null?characterEncoding=utf-8".printStackTrace().executeQuery();遍历查询结果集
while(resultSet; ", ";
}
}
if(connection;mysql".printStackTrace():mysql;
/+resultSet;向数据库发出sql执行查询;
//获取预处理statement
preparedStatement = connection
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- 1楼网友:煞尾
- 2021-03-02 22:30
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